Disease specificity of autoantibodies to cytosolic 5'-nucleotidase 1A in sporadic inclusion body myositis versus known autoimmune diseases.

Megan K Herbert, Judith Stammen-Vogelzangs, Marcel M Verbeek, Anke Rietveld, Ingrid E Lundberg, Hector Chinoy, Janine A Lamb, Robert G Cooper, Mark Roberts, Umesh A Badrising, Jan L De Bleecker, Pedro M Machado, Michael G Hanna, Lenka Plestilova, Jiri Vencovsky, Baziel G van Engelen, Ger J M Pruijn

    Research output: Contribution to journalArticlepeer-review

    Abstract

    OBJECTIVES: The diagnosis of inclusion body myositis (IBM) can be challenging as it can be difficult to clinically distinguish from other forms of myositis, particularly polymyositis (PM). Recent studies have shown frequent presence of autoantibodies directed against cytosolic 5'-nucleotidase 1A (cN-1A) in patients with IBM. We therefore, examined the autoantigenicity and disease specificity of major epitopes of cN-1A in patients with sporadic IBM compared with healthy and disease controls. METHODS: Serum samples obtained from patients with IBM (n=238), PM and dermatomyositis (DM) (n=185), other autoimmune diseases (n=246), other neuromuscular diseases (n=93) and healthy controls (n=35) were analysed for the presence of autoantibodies using immunodominant cN-1A peptide ELISAs. RESULTS: Autoantibodies directed against major epitopes of cN-1A were frequent in patients with IBM (37%) but not in PM, DM or non-autoimmune neuromuscular diseases (
    Original languageEnglish
    Pages (from-to)696-701
    JournalAnnals of the rheumatic diseases
    Volume75
    Issue number4
    DOIs
    Publication statusPublished - 24 Feb 2015

    Keywords

    • Autoantibodies
    • Autoimmune Diseases
    • Dermatomyositis
    • Polymyositis

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